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Energy
Savings
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Variable Speed Pumps |
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With conventional horizontal or console fan-coil systems, pump selection is based upon the total water friction in the mains, risers, runouts, valve train, and unit coil. Even with other "stacked" fan coil systems, water friction is reduced only by the elimination of the runouts. In the Whalen riser heat-exchanger system, chilled water friction losses are the total of mains and risersÑperiod. No runouts. No valve train. No separate coil. An attractive savings in pumping horsepower is the result. There are many successful Whalen installations with a delta-T of 16 degrees F. Obviously, chiller power consumption at various chilled water temperatures and flow rates must be considered in conjunction with selecting the circulating pumps. Chiller kW/ton savings with higher chilled water temperatures must also be weighed against increased fan horsepower in the larger fan-coil terminal units required with elevated chilled water temperatures. |
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